1143855211 has 2 divisors, whose sum is σ = 1143855212. Its totient is φ = 1143855210.

The previous prime is 1143855203. The next prime is 1143855241. The reversal of 1143855211 is 1125583411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1143855211 - 2³ = 1143855203 is a prime.

It is not a weakly prime, because it can be changed into another prime (1143855241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571927605 + 571927606.

It is an arithmetic number, because the mean of its divisors is an integer number (571927606).

Almost surely, 2^1143855211 is an apocalyptic number.

1143855211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143855211 is an equidigital number, since it uses as much as digits as its factorization.

1143855211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 31.

The square root of 1143855211 is about 33820.9285945847. The cubic root of 1143855211 is about 1045.8201816321.

The spelling of 1143855211 in words is "one billion, one hundred forty-three million, eight hundred fifty-five thousand, two hundred eleven".